L-Theanine- negligible effect, but I could function
Chamomile nighttime tea- weak effect, I combined it with L-Theanine
Hyland's Calms Forte (herbal sleep aid)- Effective, but may not be ideal for daytime use for the employed. (I use it on work days with outstanding results, but I have serious issues.) Persistent use has caused me to see halos and starbursts around lights, but it doesn't bother me.

5-HTP- Best result
Caution: 5-HTP cannot be combined with antidepressants. Will cause illness.
It will affect your cardiovascular system. If you do experiment with it, please monitor or have your physician monitor your blood pressure and cardiovascular system.
Psychological tactics:
Stay in the moment. Do I have anything to worry about right now? Worrying about an upcoming event or situation? I trained myself to shove it out of my mind and get up that day and just face it then without worrying. I'm so pathetic and have had such awful anxiety that I'd sit and worry if I was going to be okay to go to the grocery store! I only work part time, so I'd tell myself "Don't worry about it! A better day will come along to go to the store." Sitting at home, don't HAVE to go anywhere that day, I'd fight tooth and nail to not worry, because it would make things even WORSE!
I tried calming music and aromatherapy, didn't help much!